算盘 abacus; counting frame 打算盘 use an abacus; 打如意算盘 reckon without one's host; 算盘脑袋 a miser; 他老打个人小算盘。 he is always calculating. 他这个人总是打错算盘。 he always miscalculates.; 算盘子儿 beads (of an abacus)
Using an abacus to do division is a lot more difficult than to do multiplication , at least according to my own experience , particularly when one number is not divisible by the other 以我的经验来说,用算盘计算除数比起计算乘数难得多,尤其当其中涉及不能整除的数字。